One person was killed and one critically injured in two separate motorcycle crashes in the Florida Keys Friday.

A motorcyclist died at the scene of a single-vehicle crash on Kyle Boulevard on Big Pine Key around 3:45 p.m,, Monroe County Sheriff's Office reports say. No additional details were available.

Earlier in the day, a motorcycle collided with a pedestrian on southbound U.S. 1 near Mile Marker 98. The pedestrian was airlifted to the Ryder Trauma Center in Miami; the driver also sustained serious injuries, reports say.